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Digital dividend refers to the additional vacant spectrum that will be available as a result of transition from analogue to digital terrestrial television broadcasting. Wireless broadband networks such as Long-Term Evolution (LTE) can operate opportunistically in this vacant spectrum by controlling the harmful interference and overheads incurred on licensed users. With the objective of analyzing the...
Licensed-Assisted Access Long-Term Evolution (LAA- LTE) framework can offload excessive data stream to the unlicensed spectrum. Devices from different operators will compete for the same band and have to endure a more complex and congested channel conditions. Therefore a rapid and efficient access mechanism should be introduced in the LAA framework. Based on the Type B LBT channel access scheme, this...
Signal strength measurement is conducted in selected building in Damansara, Malaysia using software called Nemo Handy which installed on smartphone. Floor plans of each level of the building were taken from the Building Management. These floor plans are inserted into Nemo Handy and walk test is done on each floor. Every result of each measurement in terms of 2G, 3G and LTE were taken. Simulation of...
Multiuser multiple-input multiple-output (MU-MIMO) transmission technique based on orthogonal frequency division multiplexing (OFDM) system has been received great deal of attention in recent years due to its potential higher spectral efficiency. However, because of the accuracy of channel state information, co- scheduled mobile users may suffer large residual multiuser interference in MU-MIMO system...
The 2012 World Radiocommunication Conference (WRC-12) allocated the 694– 790MHz (700 MHz) band for the mobile service on a co-primary basis with other services including digital terrestrial television service in Region 1. Countries of Region 1 will also be able to continue the use of these frequencies for their digital terrestrial television services. This allocation of mobile service in Region 1...
Self-configuration of network parameters is a desired network management feature, especially in dense small cell deployments. One of the key parameters that requires such autonomous set up is the cell ID. Its configuration to a large extent influences the network performance affecting such mechanisms as network access, decoding, handover, and is therefore of a very high importance. In this paper a...
The rapid growth of available services depending on location awareness has led to a more and more increasing demand for positioning in challenging environments. Global navigation satellite system (GNSS) based positioning methods may fail or show weak performance in indoor and urban scenarios due to blocking of the signals and multipath propagation. In contrast, cellular radio signals provide better...
Simulation is the optimal means to evaluate the booming researches on how to enhance the end-to-end service reliability of mobile video streaming over LTE network. However, to the best of our knowledge, all existing LTE network simulators provide simulations of relatively closed virtual networks, in which only meaningless tracing data can be simulated being delivered. Researches on mobile video streaming...
Both TDD and FDD systems obtain their own merits and application limit. As the increasing of service requirement and traffic load, more and more telecommunication systems are operating in both FDD and TDD bands. It is foreseen that convergence of TDD and FDD will be the evolution trend of mobile communication systems. The paper proposes Flexible Duplex to enhance network efficiency and flexibility...
Closed-loop transmission combined with MIMO (multiple-input multiple-output) and OFDM (orthogonal frequency division multiplexing) technologies have drawn most attentions during development of the 4G systems (fourth generation of mobile communication systems). In LTE (Long Term Evolution) and LTE-Advanced systems, which are proposed by 3GPP (Third Generation Partnership Project) to be the most competitive...
In this paper the performance of multiple-input multiple-output (MIMO) system in the UTRAN Long Term Evolution (LTE) standard is evaluated by means of ergodic system capacity in low (3 km/h), medium (30 km/h) and high (120 km/h) mobility scenarios. The impact of adaptive modulation as well as Hybrid ARQ (HARQ) with Chase Combining to the distribution of effective SINR is established analytically and...
Long Term Evolution (LTE) is an emerging 4G wireless access technology. It is showing a lot of promise in field trials and gaining acceptance among the major wireless vendors such as Verizon-Vodafone, NTT-Docomo, KDDI, China Mobile, T-Mobile and others. Multi-Antenna or Multiple-Input Multiple-Output (MIMO) systems which involve the use of more than one antenna at the transmitter and receiver are...
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